Actually free plugin implement vars when running out of process when the

ppapi/proxy/ppp_instance_proxy.cc

Index: ppapi/proxy/ppp_instance_proxy.cc
===================================================================
--- ppapi/proxy/ppp_instance_proxy.cc	(revision 141525)
+++ ppapi/proxy/ppp_instance_proxy.cc	(working copy)
@@ -219,7 +219,11 @@
 
 void PPP_Instance_Proxy::OnPluginMsgDidDestroy(PP_Instance instance) {
   combined_interface_->DidDestroy(instance);
-  PpapiGlobals::Get()->GetResourceTracker()->DidDeleteInstance(instance);
+
+  PpapiGlobals* globals = PpapiGlobals::Get();
+  globals->GetResourceTracker()->DidDeleteInstance(instance);
+  globals->GetVarTracker()->DidDeleteInstance(instance);
+
   static_cast<PluginDispatcher*>(dispatcher())->DidDestroyInstance(instance);
 }